I noticed this last week too, but thought that perhaps I wasn't receiving the engrams because I was part of the group that completed the activity that week (nightfall, crucible, etc). This week, with Trial launching, another group (that I was not part of) in our clan unlocked the Trials Clan Engram, but when I go to Hawthorne, there is nothing available there except the regular green items for purchase. An I doing something wrong, or should these engrams be available at Hawthorne once they become unlocked that week. Also, should they be available when you were part of the team that completed the activity (essentially granting you one extra reward), or should they only be available for everyone else in the clan that was not part of the completing team?